OG12 - 134题

KINGLAKE

Recently implemented “shift-work equations” base on studies of the human sleep cycle
have reduced sickness, sleeping on the job, fatigue among shift workers, and have raised
production efficiency in various industries.
(A)  fatigue among shift workers, and have raised
(B)  fatigue among shift workers, and raised
(C) and fatigue among shift workers while raising
(D) lowered fatigue among shift workers, and raised
(E) and fatigue among shift workers was lowered while raising

百思不得其解~~为什么选C啊 为什么是while raising？？？查了很多帖子 都说 rasing是伴随状语？可是现在分词作伴随状语不是前面要加一个逗号的吗? 那不应该是 and fatigue among shift workers  ，while raising吗？？？

求NN解救~~ 谢谢了~~~

sisichen666

while是具有转折含义的的连词（在。。同时），while doing是省略主语的用法 ，raising的逻辑主语等于主句主语equations，raising 表示伴随，说明与前面所带来的影响同时产生的情况。

sisichen666

while doing=while 主语+be+doing，而由于主从句主语相同省略主语，变为while doing，在主语省略的情况下，一般不添加逗号

KINGLAKE

我再琢磨琢磨~~谢谢了~~